Re: [asa] CO2 content

The gentleman who sent the graph to me stands by it. He adds these
additional comments:

"The graph is from that Azolla presentation. ... you can find the
original at the link on the
bottom of http://www.hgs.org/en/cev/838

Slide 80 (where the graph is from) has 3 other sources. I suspect that
the bottom of the
picture cropped off the other sources which are listed on slide 80. The
presentation is quite interesting and shows that feed back loops will
eventually remove the CO2 we are putting into the atmosphere. Our change is
a pimple in a small hole."

Burgy

On 8/25/08, David Campbell <pleuronaia@gmail.com> wrote:
> The other big problem with the claim is that it's not any particular
> CO2 level, temperature, etc. that is ideal. The problem of modern
> global warming and associated changes is that they are happening too
> fast for many organisms to keep up, and also fall into that
> inconvenient interval for humans of too slow to be immediately obvious
> but fast enough that it will affect us over periods of years to
> decades. CO2 levels have been higher in the past. Crocodiles have
> lived in the Canadian Arctic at a similar latitude to its present
> position. We aren't prepared to have crocodiles in Churchill, and
> neither are the crocodiles, polar bears, Inuit, etc.
>
> Higher global temperatures would probably in the long term produce
> more warm, shallow seas and thus a higher diversity of mollusks, which
> sounds good to me. However, it takes several million years for the
> biological diversity to reach a new equilibrium level after a
> disturbance.
>
> --
> Dr. David Campbell
> 425 Scientific Collections
> University of Alabama
> "I think of my happy condition, surrounded by acres of clams"
>
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-- 
Burgy
www.burgy.50megs.com
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